...change the volume on a region?

Is there a way I can adjust the volume on a single region instead of a whole track? I have one part that is a bit louder than the rest of the track, and I'm trying to find a way to turn it down without having to make a whole new track.

Additionally, you could use the "Convert to region in-place" by selecting/highlighting a portion of the region that's loud and right-click to pop-up the menu. Then, apply a "reduce gain" on that portion that was just sliced out for you. You could also use an envelope and reduce the gain at the appropriate time frame.